Lennox MCA Series User manual

1
MINI-SPLIT SYSTEMS SERVICE MANUAL
MCA Series Unit Information
CORP1907-L5
11/2020
Supersedes 8/2019
Table of Contents
1. Indoor Units................................................3
1.1. ModelNumberIdentication................................... 3
1.2. IndoorUnitSpecications....................................... 3
1.3. Indoor Unit Dimensions .......................................... 4
1.4. IndoorUnitClearances........................................... 5
1.5. IndoorUnitWallMounts ......................................... 5
2. Indoor/Outdoor Matches ...........................6
3. Air Throw Data ...........................................6
4. Power and Communication Wiring for
Systems .....................................................7
4.1. Overview................................................................. 7
4.2. WireGauge............................................................. 7
4.3. TerminalConnections ............................................. 8
5. Indoor Unit Diagrams ................................8
6. Wireless Remote......................................10
6.1. Requirements ....................................................... 10
6.2. RemoteControlSpecications ............................. 10
6.3. FunctionButtons................................................... 11
6.4. Display.................................................................. 12
6.5. Operations ............................................................ 12
6.5.1. Start/StopOperation.............................. 12
6.5.2. Select Fahrenheit or Celsius............... 12
6.5.3. Cool/Fan mode ..................................... 12
6.5.4. DryMode................................................ 12
6.5.5. TimerOperation ..................................... 12
6.5.6. TimerONOperation ............................... 12
6.5.7. TimerOFFOperation ............................. 13
6.5.8. ModifyTimerON/OFFsettings............... 13
7. Connection to Centralized Controller ....13
7.1. SetIndoorUnitAddressforCentralizedControl
(UsedwithVRFOnly)........................................... 13
7.2. IndoorUnitConnectionPointsforCentralized
Controller .............................................................. 14
7.3. DryModeOperation-IndoorUnits....................... 14
7.3.1. Procedure............................................... 14
7.3.2. DryModeOperationSequence.............. 14
7.4. TestRun-IndoorUnits ......................................... 14
7.4.1. TestRunInstructions.............................. 14
7.4.2. BeforeTestRun...................................... 14
7.5. Double-CheckPipeConnections.......................... 15
7.6. AmbientTemperatureisBelow63°F(17°C)......... 15
8. Single Zone Outdoor Units .....................16
8.1. ModelNumberIdentication................................. 16
8.2. Specications........................................................ 16
8.3. CoolingCapacity................................................... 17
8.3.1. -009(208/230V) .................................... 17
8.3.2. -012(115V)............................................ 18
8.3.3. -012(208/230V) .................................... 18
MCA Single Zone Air
Conditioning Outdoor Unit
MCWA Wall Mount Single Zone
Air Conditioning Indoor Unit
Please refer to Corp1908-L5 for indoor and outdoor unit error codes and component diagnostics.

2
8.3.4. -018(208/230V) .................................... 19
8.3.5. -024(208/230V) .................................... 19
8.4. Outdoor Unit Dimensions...................................... 20
8.5. OutdoorUnitClearances ...................................... 21
8.5.1. SingleUnits ............................................ 21
8.5.2. Multiple Units.......................................... 21
9. Refrigeration Pipe Work..........................22
9.1. Single-ZoneRefrigerantCycleDiagram............... 22
9.2. Single-ZonePipingLimitations ............................. 22
10. Outdoor Unit Connections and Line
Set Usage .................................................23
10.1. PipeLength........................................................... 23
10.2. Torque Requirements ........................................... 23
11. Power and Communication Wiring for
Systems ...................................................24
12. Outdoor Unit Diagrams ...........................24
13. Installation Requirements.......................25
13.1. GasLeakCheckwithSoapWater:....................... 25
13.2. AirandMoisture.................................................... 25
13.3. AirPurgingusingaVacuumPump ....................... 25
13.4. AddingRefrigerantifPipeLengthExceeds
ChargeLessPipeLength ..................................... 25
13.5. AddRefrigerantafterLong-TermSystem
Operation.............................................................. 25
13.6. ServicingIndoorUnitRefrigerationCircuit............ 26
13.6.1. CollectingRefrigerantintoOutdoorUnit 26
13.6.2. AirPurgingwithVacuumPump.............. 26
13.7. EvacuationafterServicingtheOutdoorUnit
RefrigerationCircuit.............................................. 26
13.7.1. EvacuationoftheComplete
RefrigerationCircuit,Indoorand
Outdoor Unit........................................... 26
13.7.2. RefrigerantCharging.............................. 27
14. Electronic Function .................................27
14.1. Abbreviation.......................................................... 27
14.2. ElectricControlWorkingEnvironment. ................. 27
15. Adding Refrigerant - Single-Zone
Systems ....................................................27
16. Single-Zone Outdoor Unit LED
Locations..................................................27
17. SpecicationsandOperations ...............28
17.1. CoolingChart........................................................ 29
17.2. CapacityRequestCalculations............................. 29
17.3. OutdoorFanControl............................................. 30
17.3.1. CoolingMode ......................................... 30
18. Indoor and Outdoor Unit Disassembly ..32
18.1. IndoorUnit(AllModels) ........................................ 32
18.1.1. FrontPanel............................................. 32
18.1.2. ElectricalParts ....................................... 34
18.1.3. Evaporator.............................................. 36
18.1.4. FanMotorandFan................................. 37
18.1.5. Step Motor.............................................. 37
18.1.6. DrainHose ............................................. 37
18.2. Outdoor Unit ......................................................... 38
18.2.1. PanelPlate(MWCA009S4,
MWCA012S4andMWCA018S4)........... 38
18.2.2. PanelPlate(MWCA024S4).................... 39
18.2.3. ElectronicComponents(MWCA009S4
andMWCA012S4) ................................. 40
18.2.4. ElectronicComponents(MWCA018S4). 40
18.2.5. ElectronicComponents(MWCA024S4). 40
18.2.6. FanDisassembly(MWCA009S4and
MWCA012S4) ........................................ 41
18.2.7. FanDisassembly(MWCA018S4)........... 42
18.2.8. FanDisassembly(MWCA024S4)........... 42
18.2.9. SoundBlanket........................................ 43
18.2.10. Compressor............................................ 43

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1. Indoor Units
1.1. ModelNumberIdentication
M WC A 009 S 4-1 P
Unit Type
WC=Wall-MountedNon-DuctedUnit
Series Type
M=Mini-Split
Voltage
L=115V-1phase-60Hz
P=208/230V-1phase-60Hz
WALL-MOUNTED INDOOR UNITS
CoolingEfciency
S=StandardEfciency
Major Design Sequence
A=FirstGeneration
Nominal Cooling Capacity
009 = 0.75 ton
012 = 1 ton
018 = 1.5 tons
024 = 2 tons
Refrigerant Type
4=HFC-410A
Minor Design Sequence
1 = 1st Revision
1.2. IndoorUnitSpecications
Indoor Unit Model No. MWCA009S4 MWCA012S4 MWCA018S4 MWCA024S4
NominalSize-Tons 0.75 1 1.5 2
PowerSupply-60hz-1phase 208/230V 115V 208/230V 208/230V 208/230V
Ratedloadamps 0.22 0.43 0.22 0.40 0.40
Output(W) 47.4 46 47.4 36 89
RoomTemperatureRange(°F) Cooling 62-90 62-90 62-90 62-90 62-90
AirVolume-cfm(High/Medium/Low) 241/206/147 235/206/147 241/194/206 530/441/353 581/456/331
SoundData(dBA)-Low/Medium/High 26.5/32/38 24.5/33/38.5 24.5/34.5/37.5 30.5/34.5/42 34/40.5/46
PipingConnections-Liquid/Gas-o.d.-are-in. 1/4 / 3/8 1/4 / 1/2 1/4 / 1/2 1/4 / 1/2 3/8 / 5/8
Drainconnectiono.d.-in. 1 1 1 1 1
Net/Shippingweights-lbs. 17 / 22 19 / 25 18 / 24 26 / 31 32 / 40

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1.3. Indoor Unit Dimensions
A
B
C
TOP VIEW
FRONT VIEW
BOTTOM VIEW
SIDE VIEWSIDE VIEW
Figure 1. Indoor Unit Dimensions - Inches (mm)
Size A B C
in. mm in. mm in. mm
9K 29-5/8 752 11-3/8 289 8-5/8 219
12K 32-3/4 832 11-3/4 298 8-3/4 222
18K 39-1/8 994 12-1/2 318 9-7/8 251
24K 44 1118 13-1/4 337 10-1/4 260

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1.4. Indoor Unit Clearances
FRONT VIEW
Wall
Vertical Clearance - Clearance to Floor - 72 inches (1829 mm) Minimum
96 inches (2438 mm) Recommended
5”
(127 mm)
Minimum
6” (152 mm)
Minimum Clearance
Ceiling
Wall
Floor
5”
(127 mm)
Minimum
59”
(1499 mm)
Minimum
SIDE VIEW
Any Object
1.5. Indoor Unit Wall Mounts
MWCA009S4
Right Rear Hole
2-1/2 in. (64 mm)
diameter
Left Rear Hole
2-1/2 in. (64 mm)
diameter
Wall-Mount
Unit Outline
1-1/2 (38)
2 (51)
13-3/4 (349)
7 (178)
5-3/8
(136)
28-1/2 (724)
4
(102)
11-3/8 (289)
1-7/8
(48)
Figure 2. 9K Indoor Unit Wall Plate Dimensions -
Inches (mm)
MWCA012S4
Right Rear Hole
2-1/2 in. (64 mm)
diameter
Left Rear Hole
2-1/2 in. (64 mm)
diameter
Wall-Mount
Unit Outline
1-3/4 (44)
1-3/4 (44)
16-3/4 (425)
9-1/8 (232)
5
(127)
31-5/8 (803)
7-1/2
(191)
11-3/4 (298)
1-3/4
(44)
Figure 3. 12K Indoor Unit Wall Plate Dimensions -
Inches (mm)
MWCA018S4
Left Rear Hole
2-1/2 in. (64 mm)
diameter
Right Rear Hole
2-1/2 in. (64 mm)
diameter
20-3/8 (518)
5-5/8
(143)
Wall-Mount
Unit Outline
2-1/4 (57)
38 (965)
12-1/2 (318)
2-1/4
(57)
5-3/8 (137)
6-3/4 (171)
2-3/8 (60)
Figure 4. 18K Indoor Unit Wall Plate Dimensions -
Inches (mm)
MWCA024S4
Left Rear Hole
2-1/2 in. (64 mm)
diameter
Right Rear Hole
2-1/2 in. (64 mm)
diameter
21-3/4 (553)
11-7/8
(301)
Wall-Mount
Unit Outline
2-1/8 (54)
42-1/2 (1080)
13-1/4 (337)
1-7/8
(48)
6-7/8 (175)
8-5/8 (219)
1-7/8 (48)
Figure 5. 24K Indoor Unit Wall Plate Dimensions -
Inches (mm)

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2. Indoor/Outdoor Matches
Indoor Unit Type Outdoor Unit Indoor Unit Cooling
Capacity SEER EER AHRI Reference
Wall-Mounted
Ductless
MCA009S4S-1P MWCA009S4-1P 9,000 19.00 11.10 202515503
MCA012S4S-1L MWCA012S4-1L 12,000 16.50 10.00 202515502
MCA012S4S-1P MWCA012S4-1P 11,500 19.00 11.10 202515504
MCA018S4S-1P MWCA018S4-1P 17,000 20.00 10.80 202515505
MCA024S4S-1P MWCA024S4-1P 22,000 19.00 10.90 202515506
RatingsareAHRIcertiedtoAHRIStandard210/240(with25ft.ofconnectingrefrigerantlines);95°Foutdoorairtemperature,80°Fdb/67°Fwbenteringevaporatorair.
3. Air Throw Data
8 ft. 9 in.
6 ft. 6 in.
3 ft. 3 in.
0 ft. 0 in.
0 ft. 0 in. 3 ft. 3 in. 6 ft. 6 in. 9 ft. 8 in. 13 ft. 1 in. 19 ft. 7 in.
MWCA009S4 - COOLING
16 ft. 4 in.
1.6 ft./sec.
3.2 ft./sec.
4.9 ft./sec.
1.6 ft./sec.
1.6 ft./sec.
1.6 ft./sec.
1.6 ft./sec.
1.6 ft./sec.
3.2 ft./sec.
6.6 ft./sec.
8.2 ft./sec.
11.5 ft./sec.
8 ft. 9 in.
6 ft. 6 in.
3 ft. 3 in.
0 ft. 0 in.
0 ft. 0 in. 3 ft. 3 in. 6 ft. 6 in. 9 ft. 8 in. 13 ft. 1 in. 19 ft. 7 in.
MWCA012S4 - COOLING
16 ft. 4 in.
1.6 ft./sec.
3.2 ft./sec.
4.9 ft./sec.
1.6 ft./sec.
1.6 ft./sec.
1.6 ft./sec.
1.6 ft./sec.
3.2 ft./sec.
6.6 ft./sec.
8.2 ft./sec.
11.5 ft./sec.
1.6 ft./sec.
8 ft. 9 in.
6 ft. 6 in.
3 ft. 3 in.
0 ft. 0 in.
0 ft. 0 in. 3 ft. 3 in. 6 ft. 6 in. 9 ft. 8 in. 13 ft. 1 in. 19 ft. 7 in.
MWCA018S4 - COOLING
16 ft. 4 in. 23 ft. 0 in.
13.4 ft./sec.
7.5 ft./sec.
9.2 ft./sec.
1.6 ft./sec.
3.0 ft./sec.
1.6 ft./sec.
4.9 ft./sec.
3.0 ft./sec.
3.0 ft./sec.
1.6 ft./sec.
3.0 ft./sec.
1.6 ft./sec.
1.6 ft./sec.
8 ft. 9 in.
6 ft. 6 in.
3 ft. 3 in.
0 ft. 0 in.
0 ft. 0 in. 3 ft. 3 in. 6 ft. 6 in. 9 ft. 8 in. 13 ft. 1 in. 19 ft. 7 in.
MWCA024S4 - COOLING
16 ft. 4 in. 23 ft. 0 in. 26 ft. 2 in.
14.8 ft./sec.
8.2 ft./sec.
9.8 ft./sec.
6.6 ft./sec.
4.3 ft./sec.
4.3 ft./sec. 4.3 ft./sec.
2.3 ft./sec.
11.5 ft./sec.
2.3 ft./sec.
4.3 ft./sec.
4.3 ft./sec.

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4. Power and Communication Wiring for
Systems
CAUTION
Thisunitmustbeproperlygroundedandprotectedbya
circuitbreaker.Thegroundwirefortheunitmustnotbe
connectedtoagasorwaterpipe,alightningconductoror
atelephonegroundwire.
Do not connect power wires to the outdoor unit un-
til all other wiring and piping connections have been
completed.
Install all wiring at least 3 feet (1 m) away from televi-
sions, radios or other electronic devices in order to
avoid the possibility of interference with the unit op-
eration.
Do not install the unit near a lighting appliance that in-
cludes a ballast. The ballast may affect remote control
operation.
WARNING
Isolate the power supply before accessing unit electri-
cal terminals.
Install unit so that unit disconnect is accessible.
Follow all local and national codes, as well as this
installation instruction, during installation. Do NOT
overload electrical circuit, as this may lead to failure
andpossiblere.
Usespeciedwiringandcabletomakeelectricalcon-
nections. Clamp cables securely and make sure that
connections are tight to avoid strain on wiring. Inse-
cure wiring connections may result in equipment fail-
ureandriskofre.Wiringmustbeinstalledsothatall
cover plates can be securely closed.
IntheU.S.A.,wiringmustconformwithcurrentlocalcodes
and the current National Electric Code (NEC). In Canada,
wiringmustconformwithcurrentlocalcodesandthecurrent
CanadianElectricalCode(CEC).
4.1. Overview
Refer to unit nameplate for minimum circuit ampacity and
maximumover-currentprotectionsize.
• Allindoorunitsarepoweredbytheoutdoorunit.
• Makeallelectricalpowerwiringconnectionsatthe
outdoor unit.
• Sizeoutdoorunitpowerperlocalcodeandpower
requirements.
• Connectwiringbetweenindoorandoutdoorterminals.
• Refertounitnameplateforratedvoltage.
• Besuretoreattachallelectricalboxcoversafter
connectionsarecomplete.
• FollowNEC/CECstandardsandalllocalandstate
codesduringwiringinstallation.
See“Table1.SingleZoneInstallationWiringRequirements”
and “Table 2. Specications” on page 10 for wiring
requirements.
4.2. Wire Gauge
Table 1. Single Zone Installation Wiring Requirements
Systems
and Terminal
Designations
System Capacity
System Voltage
Number of
Conductors
Wire Type
Wire Gauge / MCA
Indoor to
OutdoorWiring
(Communication/
Power)
1,2,3andGND
12K 115VAC 4
Strandedandshieldedorunshielded
16AWG
OutdoortoMain
Power
L,NandGND
12K 115VAC 3 14AWG /
15A
Indoor to Outdoor
Wiring
(Communication/
Power)
1,2,3andGND
09K 208/230VAC 4 16AWG /
10A
Indoor to Outdoor
Wiring
(Communication/
Power)
1,2,3andGND
12K 208/230VAC 4 16AWG /
11A
OutdoortoMain
Power
L1,L2andGND
09Kand
12K 208/230VAC 3 16AWG / 9A
Indoor to Outdoor
Wiring
(Communication/
Power)
1,2,3andGND
18Kand
24K 208/230VAC 4 16AWG
OutdoortoMain
Power
L1,L2andGND
18Kand
24K 208/230VAC 3 14AWG / 18A
MCA=MinimumCircuitAmps

8
4.3. Terminal Connections
208/230V Outdoor Unit
Terminal Block
From Power
Supply
Terminal Block
208/230V Indoor Unit
Outdoor Unit Indoor Unit
3
2L1 L2
1
Y/G
13
Y/G
Y/G
115VAC Outdoor Unit
Terminal Block
From Power
Supply
Terminal Block
115VAC Indoor Unit
Outdoor Unit Indoor Unit
3
2LN
1
Y/G
13
Y/G
Y/G
*
*
18 and 24K
unit has
five terminal
sets.
Figure 6. Single Zone Wiring
5. Indoor Unit Diagrams
M
M
~
33
123
MAIN CONTROL BOARD
0
0
8
8
4
4
1
1
2
2
3
3
5
5
6
6
7
7
C
C
9
9
A
A
B
B
D
D
E
E
F
F
1
1
2
2
ON
ON
0
0
8
8
4
4
1
1
2
2
3
3
5
5
6
6
7
7
C
C
9
9
A
A
B
B
D
D
E
E
F
F
1
1
2
2
ON
ON
0
0
8
8
4
4
1
1
2
2
3
3
5
5
6
6
7
7
C
C
9
9
A
A
B
B
D
D
E
E
F
F
1
1
2
2
ON
ON
0
0
8
8
4
4
1
1
2
2
3
3
5
5
6
6
7
7
C
C
9
9
A
A
B
B
D
D
E
E
F
F
1
1
2
2
ON
ON
ENC2+S1
ENC2+S1
0~F
0~F
0~F
0~F
0~F
0~F
0~F
0~F
NETADDRESS
NETADDRESS
CODE
CODE
0~15
0~15
16~31
16~31
32~47
32~47
48~63
48~63
FOR SETTING NETADDRESS
FOR SETTING NETADDRESS
CN10A
DI SP LA Y BOARD
8
Wired Controller
OPTIONAL
ADAPTER BOARD
CN 3 (C N3 01 )
CN 50 1
CN 40 3
X Y E
To LVM
Comm.Bus
YELLOW BROWN
RED
5
5
Programmable
Wired Controller
OPTIONAL
4
Note: The programmable wired
controller and LVM use the same
port CN403.
CN 2 (C N2 01 )
CN 40 2
NOTE: COMPONENT IN
DASH LINE IS OPTIONAL
OR FIELD WIRING
S5
FOR REMOTE ON/OF
FACTORY SETTING
MODE
REMOTE ON/OFF OFFREMOTE ON/OFF ON
(T1)
(T2)
Non-Programmble
Figure 7. 09K and 12K Indoor Unit Wiring Diagram (115 and 208/230VAC)

9
SWING MOTOR1
M
YELLOW
RED
M
5
12
3
BLACK
CN10A
8
OP TION AL
ADAPTER BOARD
0
0
8
8
4
4
1
1
2
2
3
3
5
5
6
6
7
7
C
C
9
9
A
A
B
B
D
D
E
E
F
F
1
1
2
2
ON
ON
0
0
8
8
4
4
1
1
2
2
3
3
5
5
6
6
7
7
C
C
9
9
A
A
B
B
D
D
E
E
F
F
1
1
2
2
ON
ON
0
0
8
8
4
4
1
1
2
2
3
3
5
5
6
6
7
7
C
C
9
9
A
A
B
B
D
D
E
E
F
F
1
1
2
2
ON
ON
0
0
8
8
4
4
1
1
2
2
3
3
5
5
6
6
7
7
C
C
9
9
A
A
B
B
D
D
E
E
F
F
1
1
2
2
ON
ON
ENC2+S1
ENC2+S1
0~F
0~F
0~F
0~F
0~F
0~F
0~F
0~F
NETADDRESS
NETADDRESS
CODE
CODE
0~15
0~15
16~31
16~31
32~47
32~47
48~63
48~63
FOR SETTING NETADDRESS
FOR SETTING NETADDRESS
CN 50 1
CN 40 3
X Y E
To LVM
Comm.Bus
YELLOW
BROWN
RED
5
5
OPTIONAL
4
NOTE: COMPONENT IN
DASH LINE IS OPTIONAL
OR FIELD WIRING
CN 40 2
S5
FOR REMOTE ON/OF
FACTORY SETTING
MODE
REMOTE ON/OFF OFFREMOTE ON/OFF ON
(T1)
(T2)
DISPLAY BOARD
CN 3 (C N3
CN 2 (C N2 01 )
Wired Controller
Programmable
Wired Controller
Note: The programmable wired
controller and LVM use the same
port CN403.
Non-Programmble
Figure 8. 18K - 208/230VAC Indoor Unit Wiring Diagram
CN6
CN6
CN3
CN2
RED
RED
CN_TO
TRANSFORMER
CN5
INDOOR MOTOR
INDOOR MOTOR
INDOOR UNIT
TO OUTDOOR UNIT
CN_TIN
Y/G
BLUE
BLUE
5-WAY TERMINAL
MAIN BOARD
MAIN BOARD
WIRING DIAGRAM
WIRING DIAGRAM
2
1
1(2)3(4)
1(2)3(4)
2(4)
2
1
2
1
2
1
2
1
2
1
CN_L1
M
~
M
~
2
2
WHITE
WHITE
CN_N1
CN_S
FAN CAPACITOR BOARD
FAN CAPACITOR BOARD
PC1_1
PC1_1
PC2_1
PC2_1
1 2 3 4 5
1 2 3 4 5
SWING MOTOR
SWING MOTOR
M
M
5
5
1 2 3 4 5
1 2 3 4 5
CN10
CN10
T1_room
T2_pipe
CN4
CN4
3
3
WHITE
WHITE
WHITE
WHITE
3
3
1
1
2
2
1
1
2
2
3
3
0
0
8
8
4
4
1
1
2
2
3
3
5
5
6
6
7
7
C
C
9
9
A
A
B
B
D
D
E
E
F
F
1
1
2
2
ON
ON
0
0
8
8
4
4
1
1
2
2
3
3
5
5
6
6
7
7
C
C
9
9
A
A
B
B
D
D
E
E
F
F
1
1
2
2
ON
ON
0
0
8
8
4
4
1
1
2
2
3
3
5
5
6
6
7
7
C
C
9
9
A
A
B
B
D
D
E
E
F
F
1
1
2
2
ON
ON
0
0
8
8
4
4
1
1
2
2
3
3
5
5
6
6
7
7
C
C
9
9
A
A
B
B
D
D
E
E
F
F
1
1
2
2
ON
ON
ENC2+S1
ENC2+S1
0~F
0~F
0~F
0~F
0~F
0~F
0~F
0~F
NETADDRESS
NETADDRESS
CODE
CODE
0~15
0~15
16~31
16~31
32~47
32~47
48~63
48~63
FOR SETTING NETADDRESS
FOR SETTING NETADDRESS
DI SPLAY BOARD
8
8
Wi red Controller
OPTI ONAL
ADAPTER BOARD
CN3(CN301)
CN501
CN403
X Y E
To LV M
Comm.Bus
YELLOW BROWN
RED
5
5
5
5
Pr ogrammable
Wi red Cont roller
OPTI ONAL
4
4
Note: The pr ogrammable wi red
controller and LV M us e the same
CN2(CN201)
CN402
NOTE: COMPONENT IN
DASH LINE IS OPTIONAL
OR FIELD WIRING
S5
S5
FOR REMOTE ON/OF
FOR REMOTE ON/OF
FACTORY SETTING
FACTORY SETTING
MODE
MODE
REMOTE ON/OFF OFF
REMOTE ON/OFF OFF
REMOTE ON/OFF ON
REMOTE ON/OFF ON
Non-Programmble
port CN403.
Figure 9. 24K - 208/230VAC Indoor Unit Wiring Diagram

10
6. Wireless Remote
IMPORTANT!
Frequentchangestooperatingmodemaycausesystem
malfunction. Allow at least one minute between mode
changesforthesystemtostabilize.
6.1. Requirements
Usingtheremotecontroller
• Pointtheremotecontrollerdirectlyattheindoorunit.
• Standwithin26feet(8meters)oftheindoorunit.
• Donotblockthesignalbetweentheremotecontroller
andindoorunit.
NOTE: The remote controller will not function without a
clear line of sight to the indoor unit.
• Donotsubmergetheremotecontrollerinliquid.
• Donotexposetodirectsunlight.
• Donotdroporsteponremotecontroller.
• Remotecontrolholder
Useeld-providedfastenerstoattachtheremotecontroller
holdertoanysuitableverticalsurfacesuchasawall.
6.2. RemoteControlSpecications
Table 2. Specications
Function Specications
Ratedvoltage 3.0VDC(2AAAbatteries)
Minvoltageforsendingsignalto
CPU 2.4 VDC
Effectivetransmittingdistance 26feet(8meters)
Operationconditions 23°Fto140°F(-5to60°C)
FP
(Button Disabled)
ON/OFF
Turns the system on or off
MODE
Scrolls through operation
modes as follows:
FAN
Selects fan speeds in the
following order:
SLEEP
Saves energy during
sleeping hours
NOTE - Hold button for
2 seconds to activate
Silence function.
TURBO
Enables unit to reach
preset temperature in
shortest possible time
.
TIMER ON
Sets timer to turn unit on
SWING/DIRECT
SWING
Used to start or stop horizontal louver auto-swing feature.
Louver will swing up and down automatically when activated.
DIRECT
Used to change the louver movement and set the desired
up/down air flow direction. The louver angle changes 6° for
each press of the button.
LED
Turns indoor unit’s LED display on and off.
If you are sensitive to light when you go to
sleep, you can press the LED button to turn
off the LED display on the indoor unit. Press
the button again to turn it back on.
FOLLOW (ME)
Temperature sensing at the remote controller location
CLEAN
Starts and stops
self clean feature
ON/OFF
TEMP
FP
TIMER
ON
TIMER
OFF
MODE
FAN
SLEEP
TURBO
SWING
DIRECT
CLEANLED
FOLLOW
NOTE - Heat mode is not
available on
air conditioner models.
COOL → DRY →
→ FAN
AUTO → LOW → MED →
HIGH
TEMP ▲
Increases temperature in
1°F increments
(Max. Temperature is 86°F)
TEMP ▼
Decreases temperature in
1°F increments
(Min. Temperature is 62°F)
NOTE - Press and hold ▲and ▼
buttons simultaneously for 3 seconds
to switch from °F to °C.
TIMER OFF
Sets timer to turn unit off
Figure 10. Remote Controller Function Buttons